| 主权项 |
1. A pipette tip rack plate, comprising:
a plate proximal surface, a plate distal surface, multiple sleeves projecting from the plate distal surface, multiple channels and one or more projections in the channels, wherein: each of the channels terminates at the plate proximal surface and the plate distal surface and is concentric with each of the sleeves; each of which channels comprises a first interior wall defining a bore, a second interior wall defining a counter-bore, and a rim at the junction between the bore and the counter-bore, which rim is parallel with or substantially parallel with the plate proximal surface; the one or more projections project from the first interior wall; the minimum diameter, or minimum effective diameter, of the one or more projections in the channel is about 0.001 inches to about 0.005 inches greater than the external diameter, or external effective diameter, of a portion of a pipette tip opposing the one or more projections, which pipette tip optionally is seated in the channel; and the minimum diameter, or minimum effective diameter, of the counter-bore is zero to about 0.005 inches greater than the diameter, or effective diameter, of a portion of a pipette tip opposing the second interior wall, which pipette tip optionally is seated in the channel. |
